1. Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland;
2. Medecine Interne et Immunologie Clinique, Hopital Antoine Beclere, Assistance Publique-Hopitaux de Paris, Université Paris Sud, Clamart, France;
3. First Department of Internal Medicine, University of Cologne, Cologne, Germany;
4. School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom;
5. Centro Nacional de Epidemiologia, Instituto de Salud Carlos III, Madrid, Spain;
6. HIV Epidemiology and Biostatistics Group, Research Department of Infection and Population Health, Division of Population Health, University College London Medical School, London, United Kingdom;
7. Inserm U897, Université Victor Segalen Bordeaux, Centre Hospitalier Universitaire de Bordeaux, Bordeaux, France;
8. International Agency for Research on Cancer, Lyon, France;
9. AIDS Unit, Clinic of Venerologic & Dermatologic Diseases, Athens University Medical School, Syngros Hospital, Athens, Greece;
10. Hospital Clínic-Institut d'Investigacions Biomèdiques August Pi i Sunyer, University of Barcelona, Barcelona, Spain;
11. Department of Infectious Diseases, Copenhagen University Hospital, Rigshospitalet, Denmark;
12. Academic Medical Center, University of Amsterdam, The Netherlands; and
13. Institut de Santé Publique, d'Epidémiologie et de Développement, Université Victor Segalen, Bordeaux, France